| 학회 |
한국화학공학회 |
| 학술대회 |
2019년 가을 (10/23 ~ 10/25, 대전컨벤션센터) |
| 권호 |
25권 2호, p.2002 |
| 발표분야 |
촉매 및 반응공학 (Catalysis and Reaction Engineering) |
| 제목 |
Composition-Performance Relationship of Er-Modified Bimetallic CeVO4 Solid Solutions Active in NOX Reduction at High Temperatures |
| 초록 |
Metal oxide nano-composites to catalyze NOX reduction with NH3 (SCR) show severe drop in NOX conversions/N2 selectivities at elevated temperatures. This is mainly responsible for Lewis acid sites (LA) indigenous to metal oxides. In addition, LA strengths of metal oxides do not allow for the facile liberation of NH3 species adsorbed on the surfaces at high temperatures. As a way to detour major concerns stated above, here we synthesize CeVO4 and its Er-modified bimetallic analogues (Ce1-XErXVO4) with variable Er compositions. Ce1-XErXVO4 (ErX) solid solutions are iso-structural and thus can minimize the geometrical effect on the consequences during SCR and NH3 oxidation. Er0.5 is verified to provide the greatest amounts of LA and redox sites. This leads to the best SCR consequences of Er0.5 among all ErX solid solutions studied. Such desired catalytic trait provided by Er0.5 is retained even post hydro-thermal aging. This study validates the control over the composition of metals used to construct bimetallic vanadates is of great viability to promote SCR performance at high temperatures. |
| 저자 |
이석현, 권동욱, 하헌필, 김종식
|
| 소속 |
한국과학기술(연) |
| 키워드 |
촉매 |
| E-Mail |
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| 원문파일 |
초록 보기 |
